games/wesnoth: update 1.12.4 -> 1.12.5

Changes:

• Players Changelog: https://github.com/wesnoth/wesnoth/blob/1.12.5/players_changelog
• Full Changelog: https://github.com/wesnoth/wesnoth/blob/1.12.5/changelog

PR: 204503
Submitted by: Torsten Zuhlsdorff <ports@toco-domains.de> (maintainer)